Flue-expander



(No Model.)

' D. W. PATTON.

FLUE BXPAND'ER.

No. 533,317. Patented Jan. 29,1895

W/TNESSES:

' W/a/pz DAVID WILLIAMSON PATTON, F HANNIBAL, MISSOURI.

FLU E-EXPANDER.

SPECIFICATION forming part of Letters Patent No. 533,317, dated January 29, 18195.

7 Application filed May 25, 1894. Serial No. 512,417. (No model.)

To all whom it may concern:

Be it known that I, DAVID WILLIAMSON PATTON, of Hannibal, in the county of Marion and State of Missouri, have invented a new and Improved Flue-Expander, of which the The invention consists of certain parts and details, and combinations of the same, as will be fully described hereinafter, and then pointed out in the claim.

Reference is to be had to the accompanying drawings forming a part of this specification,

in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional side elevation of the improvement on the line 11 of Fig. 2. Fig. 2 is a transverse section of thesame on the line 22 of Fig. 1; and Fig. 3 is a similar view of the same on the line 33 of Fig. 1.

The improved flue expander is provided with a stock A having the outer head A and the inner head A connected with each other by longitudinally extending rods or connecting bars A In the head A are arranged the radially extending recesses A and radially extending slots A are formed in the head A in such a manner that the slots and recesses in the two heads are in longitudinal alignment with each other to receive the trunnions B and B of a corresponding roller B, as is plainly illustrated in the drawings. As shown, five sets of such aligned recesses and slots A and A are formed in the heads A and A to receive the trunnions of five rollers placed equal distances apart and arranged between the rods or longitudinal connecting bars A The inner ends of the recesses A lead to a central aperture A formed in the head A, and a similar central aperture A is formed in the head A the said apertures forming a passage for the tapering spindle or mandrel 0, provided on its outer end with a head 0 adapted to be taken hold of by a suitable tool in the hands of the operator, to force the mandrel inward to press the rollers 13 outward, and to rotate the same by turning the mandrel. When the mandrel C is withdrawn the rollers B can be readily taken out of the stock A and replaced therein, by pressing the outer ends of the rollers inward, so that the trunnions pass from the recesses A into the contral aperture A, and by then pushing the rollers longitudinally they pass through the central, aperture A to the outside of the stock. In replacing the rollers the same are first put through the aperture A and then pushed away from the said aperture at their inner ends, to engage the trunnion B with the cor-' responding slot A after which the roller is pressed away from the central aperture at its outer end to engage the other trunnion B with the corresponding recess A The head A extends a suitable distance beyond the peripheral surface of the rollers B,

so as toform, at its inner face, an abutment for the projecting end of the flue or pipe F to be expanded. See Fig. 1. On this head A is formed a peripheral screw thread on which screws the internally threaded sleeve D,

adapted to be secured in place by a set screw E. The inner edge of this sleeve D is adapted to abut against the outer face of the flue sheet on the face of the sheet G. When. this adjustment has been made on the flue sheet, the

operator manipulates the mandrel O as previously described, so as to actuate the rollers B, to expand the flue in the usual manner, to V prevent leakage.

Having thus fully described my invention, I claim as new and desire to secure byLetters Patent A flue expander, comprising two spaced, connected heads each provided with a central aperture for the passage of a mandrel, and a series of radial slots, the slots in one of the heads being closed at their inner ends, while those in the other head extend to the said central aperture, rollers journaled in the said slots, one of the heads extending outward be yond the rollers to engage the end of the flue and being provided with an external screw thread, and a female threaded sleeve screwing on the said head and adapted to engage the flue sheet, substantially as described.

DAVID WILLIAMSON PATTON.

Witnesses:

A. J. LOWER, JOHN G. Foss. 

